1. Following the rules is boring.
2. Some things are easier with help, but nothing is impossible alone.
3. The sensation of regeneration is more than enough to make up for the pain of dying.
4. Tests are rubbish, but refusing to take them causes more headaches than it's worth.
5. Some points in history cannot be changed. Unless you have a Paradox Machine, and that's usually more trouble than leaving it alone.
6. How to make a Paradox Machine. Just in case.
7. There's no point in having power if you don't use it.
8. How to fly a TARDIS. Passed with flying colors.
9. Asgard's grass stains much worse than Gallifrey's.
10. Nobody can be trusted. Nobody. Well, I suppose technically I was a graduate, but I was still in the school building.